Holley 534-50 - Holley Air/Fuel Ratio Monitors
Holley #510-534-50Indicator w/o Sensor |
||||
|
|
||||
|
||||
|
|
||||
Monitor the air fuel ratio of your engine while you drive. Part #510-534-51 is supplied with an oxygen sensor and designed for carbureted, non-sensor equipped vehicles. Both versions let you see the effects of tuning adjustments made on your vehicle.
